Protective Effects of a Polyphenol-Rich Extract from Syzygium cumini (L.) Skeels Leaf on Oxidative Stress-Induced Diabetic Rats

Table 1

Quantification of main polyphenols identified in PESc.

Compounds	Structure	μg/mg of PESc
Gallic acid		11.15 ± 0.90
Myricetin		192.70 ± 16.50
Quercetin		4.72 ± 0.06

Gallic acid (AUC_254nm = 624.40 [GA] + 17.25), myricetin (AUC_254nm = 132.90 [MYR] + 26.34), and quercetin (AUC_375nm = 1110.10 [QUER] − 36.42) were quantified by HPLC-UV. The retention times for those peaks used for quantitation purposes for each compound were previously identified by MS/MS as shown in Figure 3. Results are reported per mg of PESc and correspond to the mean ± SD from three different batches.